// 短视频播放
document.querySelector('.video ul').onclick = function() {
    document.body.style.overflow = 'hidden'
    document.querySelector('.video-wrapper').style.display = 'block'
}
document.querySelector('.video-wrapper .close').onclick = function() {
    document.body.style.overflow = 'auto'
    document.querySelector('.video-wrapper').style.display = 'none'

    document.querySelector('.video-wrapper video').pause()
}


let cols = [
    {left:0, top: 0},
    {left:254, top: 0},
    {left:254*2, top: 0},
    {left:254*3, top: 0},
]
let videoHeight = 0

function Waterfall()
{


